going pilot to co-pilot is the act of crapping in the stall next to a friend. also known as synchronized plopping. originated from the back-woods of Philmont,

Variations include going pilot to bombardier

Terms to know before going Pilot to co-pilot:
Flight Stick- when entering into an outhouse of some sort, this is the stick that the pilot must carry to rid himself of any unsuspecting "friendly" spiders that await in the toilet